C1111233131211111211113313331333133313231323331333133313223313223322331   >>    C111123313121111121111331333133313331323132333133313331322331322332233   <<    C1111233131211111211113313331333133313231323331333133313223313223322333   >>      C1111233131211111211113313331333133313231323331333133313223313223322332   >>